"We are temporarily removing the patch until we can pinpoint the cause of save data loss," the company said in a Steam announcement. "We are actively working on this and will keep everyone posted as we work towards a fix. We sincerely apologize for this disruption."

One player on the Steam forums for MKX says he reached out to High Voltage and was told that the patch would be coming out today or Wednesday "at the very latest."

There was no mention, though, of whether or not the developers will be able to restore any progress lost by the patch. If not, that's horrible. We're talking about players potentially losing dozens of hours' worth of work (well, "work") here. That's the kind of crap that would make me drop a game and never look back. I lost about two hours of campaign progress in Battlefield 4 and never went back to single-player so I can't imagine losing 20+ hours of effort.